Irrigation Efficiency can be subdivided into following: Water -conveyance efficiency : It is the ratio of the water delivered into the fields from the outlet point of the channel, to the water entering into the channel at its starting point. It takes the conveyance or transit losses into consideration. Water - application Efficiency : It is the ratio of the quantity of water stored into the root zone of the crops to the quantity of water actually delivered into the field. It may also be called on farm efficiency, as it takes into consideration the water lost in the farm. Water -storage Efficiency : It is the ratio of the water stored in the root zone during irrigation to the water needed in the root zone prior to irrigation (i.e. field capacity - existing moisture content). Efficiency of water use : It is the ratio of the water beneficially used, including leaching water, to the quantity of water delivered. Uniformity coefficient or Water distribution efficiency : The water distribution efficiency represents the extent to which the water has penetrated to a uniform depth, throughout the field. When the water has penetrated uniformly throughout the field, the deviation from the mean depth is zero and the water distribution efficiency is 1.0. it also measures the effectiveness of irrigation.